Hardness,　elastic　modulus,　yield　strength,　work　hardening　exponent,　and　residual　stress　within　shot-peened　layer　of　nickel-based　single　crystal　superalloy　DD6　were　experimentally　obtained　by　nanoindentation　under　a　maximum　load　of　100　mN.　The　residual　stresses　calculated　by　different　models　have　similar　variation　with　the　depth,　but　the　values　differ　significantly　with　Wang＇s　model　most　suitable　for　shot-peened　DD6.　It　is　found:　the　maximum　residual　compressive　stress　is　1.23　GPa　at　the　depth　of　40　mu　m;　and　the　total　depth　of　residual　compressive　stress　layer　is　140　mu　m.　Mechanical　properties　such　as　indentation　hardness　and　yield　strength　are　affected　by　residual　stress,　which　has　little　effect　on　elastic　modulus.　The　effects　of　residual　stress　on　various　indentation　parameters　such　as　indentation　work/displacement　and　contact　depth/stiffness　were　quantified　by　linear　expressions.　The　microstructural　change　in　the　shot-peened　layer　was　found　to　be　associated　with　the　distribution　of　residual　stress.